The explorer is running in 'regtest' mode. This saves disk space, but there is limited data.
The code for this application can be found at github.com/pdxrod/blockchain_explorer.

home    blocks

Enter a block height, e.g. 123, or the start of a bitcoin address, e.g. mxMfLjAez

Height: 473
Hash: 407ac4497a2ab06db3c33a01ab98b7fc3c0e404df66d0637bd7110b2ce1c9a5e
Previous block: 543e566ed5a97b6e9d6c81779988cd6c79a986f61ae3f2a35dbb1402f6786c4f
Next block: 2ef52c2e5e70aacd4f81a8c9c58de1d68ab28f29413309ccfcdfbbd5ca68d0e2
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864222
Stripped size: 218
Size: 254
Nonce: 3
Merkle root: c423862ef016bb0339c5be353297db28e173956648b42cecd29653dd0285db23
Median time: 1701864221
Difficulty: 4.656542373906925e-10
Confirmations: 1771
Chainwork: 00000000000000000000000000000000000000000000000000000000000003b4
Bits: 207fffff